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Molar Occlusal Relationships — NDEB AFK MCQ

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ModerateDental Anatomy & OcclusionMolar Occlusal RelationshipsNDEB AFK

Which cusp of the mandibular first molar occludes in the central fossa of the maxillary first molar in a Class I occlusion?

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Correct answer: C — Mesiobuccal cusp

In Angle Class I molar occlusion, the mesiobuccal cusp of the mandibular first molar occludes in the central fossa of the maxillary first molar, and the mesiobuccal cusp of the maxillary first molar occludes in the mesiobuccal groove of the mandibular first molar. The mesiolingual cusp of the maxillary first molar (the largest cusp) occludes in the central fossa of the mandibular first molar and is the main supporting cusp.

Reference: Ash – Wheeler's Dental Anatomy, Physiology, and Occlusion, 11th ed., 2020